1CBS Evening News With Katie Couric
monarchs have been spotted in south texas. last year, seth doane reported their population was down 75%. but tonight he tells us they're making a comeback. >> reporter: hundreds of millions of monarch butterflies cluster for warmth in these trees every winter. we were clearly impressed when we visited mexico last year. there are an estimated 250 million monarch butterflies that winter in this preserve. that sounds like a lot, it certainly looks like a lot. but the butterfly population we saw was actually at an all-time recorded low as overdevelopment and illegal logging decimated the forests. this year, the trees were dripping in butterflies and the skies filled with millions more monarchs. butterfly colonies covered nearly ten acres of forest-- double the area last year. conservationist bill toone says that's great news, but... >> all that has to be kept in perspective with the fact that last year was the lowest number of butterflies in mexico since we started recording in 1993. >> reporter: why the rebound? the mexican government has made progress fighting illegal logging, down 97%.
images of seth grogan sitting around playing video games and being irresponsible. >> generally juvenile behavior, yes. >> men in their 20s and 30s who are now single, at one time in history, they would have been married or on the road to being married. >> they would have been like george bailey. >> now they really have to think, well, it's way far away. i don't know how many men have told me, i don't have to marry until i'm 30 or 40. they have a little bit of money in their pockets, they're working on their careers, and they're trying to figure it out. >> do you think women are smarter and all those things? >> i think it's those things, but i think there are other things going on. we have to look at the economy. a lot of these young guys now, instead of getting married or getting jobs, they're now in graduate school, they know placement is very difficult to come by as far as work, so they have that forced extended adolescence, so there are other things going on. >> and when you think about the biology, kids in general, we're living longer, so it might take longer to grow up. and the tru
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